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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 9 | daniel-mar | 1 | |
| 2 | Annotations for the Aysalia DOS I & II source codes |
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| 3 | =================================================== |
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| 4 | |||
| 5 | CALLING FLOW |
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| 6 | ------------ |
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| 7 | |||
| 8 | When running under Windows: |
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| 9 | |||
| 10 | AyDos.exe (32 Bit PE) --> DOSBox (32 Bit PE) --> AyDos.exe (16 Bit COM) --> AyDos.mnu (16 Bit MZ) --> AyDos1/2.gam (16 Bit MZ) |
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| 11 | |||
| 12 | 1. AyDos.exe (32 Bit PE) calls DOSBox.exe (32 Bit PE) with config DOSBox.conf |
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| 13 | 2. DOSBox.conf starts AyDos.exe (16 Bit MZ) as autostart |
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| 14 | 3. AyDos.exe (16 Bit COM) calls AyDos.mnu (16 Bit MZ) |
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| 15 | 4. AyDos.mnu (16 Bit MZ) shows a menu and calls AyDos1.gam or AyDos2.gam (both 16 Bit MZ) |
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| 16 | |||
| 17 | When running under DOS: |
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| 18 | |||
| 19 | AyDos.exe (16 Bit COM) --> AyDos.mnu (16 Bit MZ) --> AyDos1/2.gam (16 Bit MZ) |
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| 20 | |||
| 21 | 1. AyDos.exe (16 Bit COM) calls AyDos.mnu (16 Bit MZ) |
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| 22 | 2. AyDos.mnu (16 Bit MZ) shows a menu and calls AyDos1.gam or AyDos2.gam (both 16 Bit MZ) |
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| 23 | |||
| 24 | |||
| 25 | AYDOS.EXE |
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| 26 | --------- |
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| 27 | |||
| 28 | AyDos.exe is a "fat binary" which can be called by DOS and Windows. |
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| 29 | |||
| 30 | In Windows mode, it calls DOSBox.exe with the arguments "-noconsole -conf DOSBox.conf" and |
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| 31 | the working directory being the directory where the EXE file is located. |
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| 16 | daniel-mar | 32 | It also centers the DOSBox window and changes its window title and icon at runtime. |
| 9 | daniel-mar | 33 | |
| 34 | In DOS mode, it executes the application "AYDOS.MNU" (which is actually a COM-file |
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| 35 | containing the menu code that will eventually call AYDOS1.GAM or AYDOS2.GAM which are |
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| 36 | actually MZ-executables). |
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| 37 | |||
| 38 | To create this fat binary, do the following: |
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| 39 | |||
| 40 | 1. Compile AyDos.exe with Delphi |
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| 41 | |||
| 42 | 2. Compile DosStub.com with TASM |
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| 43 | |||
| 44 | 3. With an hex editor, copy the contents of DosStub.com into AyDos.exe to offset 0x40 |
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| 45 | |||
| 46 | |||
| 47 | AYDOS1.GAM and AYDOS2.GAM |
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| 48 | ------------------------- |
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| 49 | |||
| 50 | These games were developed and compiled in QuickBasic, but unfortunately the source code is lost. |
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| 51 | |||
| 52 | The EXE files have been modified with a hex editor to fix some small issues. |
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| 53 | A side effect of one fix is that the video mode is not reset when the game exists. |
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| 54 | Therefore, the EXE files have been renamed to GAM and will be called by the menu/launcher executable, |
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| 55 | which resets the video mode correctly, in addition in showing a menu. |
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| 56 | |||
| 57 | |||
| 58 | DISTRIBUTE |
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| 59 | ---------- |
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| 60 | |||
| 61 | AyDos.exe |
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| 62 | AyDos.mnu |
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| 63 | AyDos1.gam |
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| 64 | AyDos2.gam |
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| 65 | DOSBox.exe |
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| 66 | DOSBox.conf |
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| 67 | SDL.dll (required by DOSBox) |
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| 68 | SDL_net.dll (required by DOSBox) |